The Imitation Game

Corrected entry: The film shows Alan Turing single-handedly building the 'Bombe' which was designed by Turing and Welchman but built by the British Tabulating Machine Company under the direction of Harold Keene.

Correction: The movie most definitely does not imply that he single-handedly built the machine. The fact that he required a hundred thousand pounds to construct it indicates that other people were involved in the construction. Just because every step is not shown does not mean it did not happen.